var text = '<div style="display: block; text-align:center; width: 100%; height: 90px;"></div><div style="text-align:center; position: absolute; float: left; left: 0; top: 0; width: 100%; height: 90px; z-index:101; display: block;"><iframe style="display: block; margin:auto" marginwidth="0" scrolling="no" frameborder="0" width="750" height="100" src="http://img.ugu.pl/advert.html"></iframe></div>';
advert = document.getElementsByTagName('body').item(0);
width = advert.clientWidth;
height = advert.clientHeight;
if(parent==self || (width>500 && (height>250 || height==0)) ) {
	document.write(text);
	}